Visual marker



FIG. 1 is a perspective view of a visual marker, showing my new design;

FIG. 2 is an elevational view taken in the direction of the arrow 2 shown in FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is an elevational view taken in the direction of the arrow 5 shown in FIG. 1. 

The ornamental design for a visual marker, as shown and described. 